mt76: move spin_lock_bh to spin_lock in tasklet

as you are already in a tasklet, it is unnecessary to call spin_lock_bh.
Signed-off-by: Xingbang Liu <liu.airalert@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c

@@ -53,7 +53,7 @@ static void mt76x02_pre_tbtt_tasklet(struct tasklet_struct *t)
 		mt76_skb_set_moredata(data.tail[i], false);
 	}
 
-	spin_lock_bh(&q->lock);
+	spin_lock(&q->lock);
 	while ((skb = __skb_dequeue(&data.q)) != NULL) {
 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 		struct ieee80211_vif *vif = info->control.vif;
@@ -61,7 +61,7 @@ static void mt76x02_pre_tbtt_tasklet(struct tasklet_struct *t)
 
 		mt76_tx_queue_skb(dev, q, skb, &mvif->group_wcid, NULL);
 	}
-	spin_unlock_bh(&q->lock);
+	spin_unlock(&q->lock);
 }
 
 static void mt76x02e_pre_tbtt_enable(struct mt76x02_dev *dev, bool en)